Electric ground-state properties of ${}_{}{}^7{}_{}{}^{}\mathrm{Li}$ have been measured in a consistent way by observation of the Coulomb interaction of aligned ${}_{}{}^7{}_{}{}^{}\mathrm{Li}$ ions with heavy target nuclei. Besides the quadrupole moment ($Q_s$=-3.70±0.08 $e^2$ ${\mathrm{fm}}^2$) and the B(E2,${\mathrm{}(3/2)\mathrm{}}^{\mathrm{-}}$→${\mathrm{}(1/2)\mathrm{}}^{\mathrm{-}}$) value (8.3±0.5 $e^2$ ${\mathrm{fm}}^4$), the tensor moments of the nuclear polarizability ${\tau }_{12}$ and ${\tau }_{11}$ were determined (${\tau }_{12}$=${\tau }_{11}$=0.23±0.06 ${\mathrm{fm}}^3$). Present theoretical investigations on the structure of ${}_{}{}^7{}_{}{}^{}\mathrm{Li}$ reveal difficulties in providing a unified description of all four properties.

• Received 10 January 1985

DOI:https://doi.org/10.1103/PhysRevLett.55.480